<template>
	<view>
		<!-- 导航栏 -->
		<free-nav-bar title="选择" showBack :showRight="true">
			<free-main-button :name="buttonText" slot="right" @click="submit"></free-main-button>
		</free-nav-bar>
		
		<!-- 通讯录列表 -->
		<scroll-view scroll-y="true" 
		:style="'height:'+scrollHeight+'px;'"
		:scroll-into-view="scrollInto">
			
			<template v-if="type === 'see'">
				<free-list-item v-for="(item,index) in typeList"
				:key="item.key" :title="item.name" 
				:showRightIcon="false" showRight
				@click="typeIndex = index">
					<view slot="right"
					style="width: 40rpx;height: 40rpx;"
					class="border rounded-circle flex align-center justify-center mr-4">
						<view v-if="typeIndex === index" 
						style="width: 30rpx;height: 30rpx;"
						class="main-bg-color rounded-circle"></view>
					</view>
				</free-list-item>
			</template>
		
		
			<template v-if="type !== 'see' || (type === 'see' && (typeIndex === 1 || typeIndex === 2)) ">
				<view v-for="(item,index) in list" :key="index"
				:id="'item-'+item.title">
					<view v-if="item.list.length" 
					class="py-2 px-3 border-bottom bg-light">
						<text class="font-md text-dark">{{item.title}}</text>
					</view>
					<free-list-item v-for="(item2,index2) in item.list" 
					:key="index2" :title="item2.name" 
					:cover="item2.avatar || '/static/images/userpic.png'"
					:showRightIcon="false" showRight
					@click="selectItem(item2)">
						<view slot="right"
						style="width: 40rpx;height: 40rpx;"
						class="border rounded-circle flex align-center justify-center mr-4">
							<view v-if="item2.checked" 
							style="width: 30rpx;height: 30rpx;"
							class="main-bg-color rounded-circle"></view>
						</view>
					</free-list-item>
				</view>
			</template>
			
		</scroll-view>
		
		<!-- 侧边导航条 -->
		<view class="position-fixed right-0 bottom-0 bg-light flex flex-column" :style="'top:'+top+'px;'" style="width: 50rpx;" @touchstart="touchstart" @touchmove="touchmove" @touchend="touchend">
			<view class="flex-1 flex align-center justify-center"
			v-for="(item,index) in list" :key="index">
				<text class="font-sm text-muted">{{item.title}}</text>
			</view>
		</view>

		<view class="position-fixed rounded-circle bg-light border flex align-center justify-center" v-if="current"
		style="width: 150rpx;height: 150rpx;left: 300rpx;"
		:style="'top:'+modalTop+'px;'">
			<text class="font-lg">{{current}}</text>
		</view>

	</view>
</template>

<script>
	import freeNavBar from "@/components/free-ui/free-nav-bar.vue"
	import freeListItem from "@/components/free-ui/free-list-item.vue"
	import freeMainButton from '@/components/free-ui/free-main-button.vue';
	import { mapState } from 'vuex'
	import $R from '@/common/free-lib/request.js';
	export default {
		components: {
			freeNavBar,
			freeListItem,
			freeMainButton
		},
		data() {
			return {
				typeIndex:0,
				typeList:[{
					name:"公开",
					key:"all"
				},{
					name:"谁可以看",
					key:"only"
				},{
					name:"不给谁看",
					key:"except"
				},{
					name:"私密",
					key:"none"
				}],
				
				top:0,
				scrollHeight:0,
				scrollInto:'',
				current:'',
				
				selectList:[],
				
				type:"",
				
				limit:9,
				
				id:0
			}
		},
		onLoad(e) {
			let res = uni.getSystemInfoSync()
			this.top = res.statusBarHeight + uni.upx2px(90)
			this.scrollHeight = res.windowHeight - this.top
			
			if(e.type){
				this.type = e.type
			}
			if(e.limit){
				this.limit = parseInt(e.limit)
			}
			if(e.id){
				this.id = e.id
				if(e.type === 'inviteGroup'){
					this.limit = 1
				}
			}
			this.$store.dispatch('getMailList')
		},
		computed: {
			...mapState({
				list:state=>state.user.mailList
			}),
			buttonText(){
				let text = '发送'
				if(this.type === 'createGroup'){
					text = '创建群组'
				}
				return text + ' ('+this.selectCount+')'
			},
			modalTop(){
				return (this.scrollHeight - uni.upx2px(150)) / 2
			},
			// 每个索引的高度
			itemHeight() {
				let count = this.list.length
				if(count < 1){
					return 0
				}
				return this.scrollHeight /  count
			},
			// 选中数量
			selectCount(){
				return this.selectList.length
			}
		},
		methods: {
			touchstart(e){
				this.changeScrollInto(e)
			},
			touchmove(e){
				this.changeScrollInto(e)
			},
			touchend(e){
				this.current = ''
			},
			// 联动
			changeScrollInto(e){
				let Y = e.touches[0].pageY
				// #ifdef MP
				Y = Y - this.top
				// #endif
				let index = Math.floor(Y / this.itemHeight)
				let item = this.list[index]
				if(item){
					this.scrollInto = 'item-'+item.title
					this.current = item.title
				}
			},
			// 选中/取消选中
			selectItem(item){
				if(!item.checked && this.selectCount === this.limit){
					// 选中|限制选中数量
					return uni.showToast({
						title: '最多选中 '+this.limit+' 个',
						icon: 'none'
					});
				}
				item.checked = !item.checked
				if(item.checked){ // 选中
					this.selectList.push(item)
				} else { // 取消选中
					let index = this.selectList.findIndex(v=> v === item)
					if(index > -1){
						this.selectList.splice(index,1)
					}
				}
			},
			submit(){
				if(this.type !== 'see' && this.selectCount === 0){
					return uni.showToast({
						title: '请先选择',
						icon: 'none'
					});
				}
				switch (this.type){
					case 'createGroup': // 创建群组
					$R.post('/group/create',{
						ids:this.selectList.map(item=>item.user_id)
					}).then(res=>{
						uni.showToast({
							title: '创建群聊成功',
							icon: 'none',
							duration:3000
						});
						uni.navigateBack({
							delta: 1
						});
					})
						break;
					case 'sendCard':
					let item = this.selectList[0]
					uni.$emit('sendItem',{
						sendType:"card",
						data:item.name,
						type:"card",
						options:{
							avatar:item.avatar,
							id:item.user_id
						}
					})
					uni.navigateBack({
						delta: 1
					});
						break;
					case 'remind':
					uni.$emit('sendResult',{
						type:"remind",
						data:this.selectList
					})
					uni.navigateBack({
						delta: 1
					});
						break;
					case 'see':
					let k = this.typeList[this.typeIndex].key
					if(k !== 'all' && k!== 'none' && !this.selectCount){
						return uni.showToast({
							title: '请先选择',
							icon: 'none'
						});
					}
					uni.$emit('sendResult',{
						type:"see",
						data:{
							k,
							v:this.selectList
						}
					})
					uni.navigateBack({
						delta: 1
					});
						break;
					case 'inviteGroup':
					console.log(this.selectList);
					$R.post('/group/invite',{
						id:this.id,
						user_id:this.selectList[0].user_id
					}).then(res=>{
						uni.showToast({
							title: '邀请成功',
							icon: 'none'
						});
						uni.navigateBack({
							delta: 1
						});
					})
						break;
				}
			}
		}
	}
</script>

<style>

</style>
